Bite Registration and Alginate

Question 1

what are the components of alginate

Answer 1

potassium alginate
calcium sulfate
trisodium phosphate
diatomaceous earth
zinc oxide
potassium titanium fluoride

Question 2

calcium sulfate reacts with the potassium alginate in order to form ___

Answer 2

gel phase (solid)

Question 3

diatomaceous earth and zinc oxide add what to alginate

Answer 3

the bulk of the material

Question 4

sol phase is when material is in a ___ state

Answer 4

liquid

Question 5

loss of moisture is aka

Answer 5

synersis

Question 6

ambibtion is known as

Answer 6

absorption of water by material

Question 7

normal set has a working time of ___ and setting time of ___

Answer 7

working - 2 mins

Setting - 4.5 min

Question 8

fast set has a working and setting time of what

Answer 8

working - 1.25 min

setting - 1-2 mins

Question 9

working time is for

Answer 9

mixing the material and loading

Question 10

setting time is when a ___ occurs

Answer 10

chemical reaction occurs changing the state of the material to solid

Question 11

what temp should water be when mixing alginate

Answer 11

70 F or 21C

Question 12

what is hysteresis

Answer 12

the change in temperature that causes reversible hydro colloid material to change states

Question 13

what are the 3 curing stages

Answer 13

initial set - working time
final set - setting in the mouth
final cure - 1-24 hrs after removal

Question 14

what is a bite/occlusal registration used for

Answer 14

obtaining the centric relationship of the archea

Question 15

3 types of bite registrations

Answer 15

wax bite
polysiloxane putty
ZOE paste

Question 16

what is border moulding

Answer 16

a closed adaptation of impression edges to the muccobuccal fold

Question 17

preliminary impressions are done with what material

Answer 17

alginate

Question 18

what material is used for gina impressions

Answer 18

elastomeric materials

Question 19

where do you stand when placing a mandibular impression tray

Answer 19

infront of the patient

Question 20

where do you stand to place a maxillary tray

Answer 20

slightly to the side

Question 21

what is utility or beading wax used for

Answer 21

extending the length and height of the trays

Question 22

why are perforated trays used

Answer 22

to enhance the mechanical lock or seal of the impression

Question 23

what is the clinical procedure of impressions

Answer 23

assemble materials and equipment
prepare the patient
select and prep trays
take mandibular the maxillary impression